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STMicroelectronics SMB6F154AY
- Part No.:
- SMB6F154AY
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AA, SMB Flat Leads
- Datasheet:
-
SMB6F154AY.pdf
- Description:
- TVS DIODE 154VWM 246VC SMBFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:6,533
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Product details
Overview
SMB6F154AY from STMicroelectronics is an AEC-Q101-qualified unidirectional automotive TVS diode in SMB Flat package, designed to clamp transient overvoltages up to 246 V (10/1000 µs) while delivering 317 A peak pulse current and maintaining low dynamic resistance (12.6 Ω). It operates at junction temperatures up to +175 °C and exhibits only 0.2 µA leakage at 25 °C, making it suitable for protecting CAN, LIN, and sensor supply lines in 12 V/24 V vehicle subsystems.
For engineers reviewing the SMB6F154AY datasheet, SMB6F154AY pinout, SMB6F154AY application, or SMB6F154AY equivalent, this device is selected for ISO 7637-2 Pulse 1 (–150 V), Pulse 3a (–220 V), and ISO 10605 ESD robustness (±30 kV contact/air), with verified clamping performance across temperature and surge duration.
Technical Context
This TVS diode uses planar silicon technology to achieve stable breakdown voltage (171–189 V) and low leakage across –55 °C to +175 °C operating range. Its unidirectional configuration enables asymmetric protection of DC-biased lines without forward conduction during normal operation.
The SMB Flat package supports high thermal dissipation via copper pad layout (Rth(j-a) down to ~4.5 °C/W with 3 cm² copper per lead), and its 1 mm profile meets space-constrained automotive module requirements. Dynamic resistance (12.6 Ω) and clamping voltage (246 V @ 317 A) are characterized for both 10/1000 µs and 8/20 µs waveforms per IEC 61000-4-4 and ISO 7637-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 154 V - Maximum continuous reverse working voltage before breakdown; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 171–189 V @ 1 mA - Confirmed voltage range where avalanche conduction begins; ensures reliable triggering above nominal bus voltage. |
| Clamping Voltage (VCL) | 246 V @ 317 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; defines maximum stress on downstream ICs. |
| Peak Pulse Power (PPP) | 600 W @ 10/1000 µs, 4 kW @ 8/20 µs - Sustained energy-handling capability under standardized surge profiles. |
| Leakage Current (IR) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - Minimal parasitic loading on high-impedance sensor or communication lines. |
| Junction Temperature Range | –55 °C to +175 °C - Enables placement near powertrain ECUs, motor drivers, and under-hood modules. |
| Dynamic Resistance (RD) | 12.6 Ω - Low impedance during clamping improves voltage regulation and reduces overshoot during fast transients. |
Pinout & Package
SMB6F154AY is housed in an SMB Flat surface-mount package (JEDEC MO-213AA), measuring 3.3–3.95 mm × 5.2–5.6 mm × 1.0 mm max height, with matte tin-plated leads compliant with J-STD-002 and IPC-7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked side) | Surge current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference node | Typically tied to system ground or negative rail; establishes unidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| ISO 7637-2 compliance | Withstands Pulse 1 (–150 V), Pulse 2a (+112 V), Pulse 3a (–220 V), and Pulse 3b (+150 V) without degradation. |
| ESD robustness | Exceeds ISO 10605 ±30 kV (contact/air) and IEC 61000-4-2 Level 4 (±15 kV contact / ±25 kV air). |
| High-temperature stability | Clamping voltage shift coefficient αT = 10.8 × 10–4/°C ensures predictable VCL behavior up to +175 °C junction. |
| Low-profile mounting | 1 mm max height enables integration into compact ADAS camera modules, body control units, and infotainment head units. |
Applications
| Automotive CAN Bus Protection | Engine Control Unit (ECU) Power Input |
|---|---|
|
Use Scenario: Protecting high-speed CAN FD transceivers against load dump and inductive switching spikes in 12 V power domains. IC Role / Device Role: Unidirectional clamping diode placed between CAN_H/CAN_L lines and chassis ground. Use Value: Limits transient voltage to ≤246 V during ISO 7637-2 Pulse 1 (–150 V), preventing transceiver latch-up or permanent damage. |
Use Scenario: Safeguarding 5 V/3.3 V regulator inputs in engine management systems exposed to battery reversal and jump-start surges. IC Role / Device Role: Primary overvoltage clamp on main 12 V input rail upstream of LDOs and microcontrollers. Use Value: Clamps 220 V negative transients (Pulse 3a) to safe levels within 1 ns response time, preserving downstream power integrity. |
| Automotive Sensor Supply Lines | Body Control Module (BCM) LIN Bus |
|
Use Scenario: Shielding analog pressure, temperature, and position sensors from ESD and alternator ripple-induced spikes. IC Role / Device Role: Standoff-rated TVS on 5 V sensor reference rail, positioned adjacent to connector entry point. Use Value: 0.2 µA leakage at 25 °C avoids signal offset errors; 175 °C Tj rating supports under-hood placement near exhaust manifolds. |
Use Scenario: Securing LIN transceivers in door modules and seat controllers against cable discharge events and battery disconnect transients. IC Role / Device Role: Unidirectional TVS on LIN bus line referenced to local ground, enabling fail-safe communication during fault conditions. Use Value: Withstands ±30 kV ESD (ISO 10605) without parameter shift, ensuring uninterrupted diagnostic and actuation commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | Higher VRM (150 V), lower PPP (600 W), same SMB package but non-AEC-Q101 rated. | Limited to industrial or non-safety-critical automotive subsystems lacking AEC-Q101 validation. | Select when cost sensitivity outweighs automotive qualification requirements and surge exposure is less severe. |
| SMCJ150A | Same VRM (150 V), higher PPP (1500 W), larger SMC package (7.11 × 6.22 mm), AEC-Q101 qualified. | Better suited for high-energy load dump scenarios in alternator or starter circuits where PCB space allows. | Choose when peak surge energy exceeds 600 W and board layout accommodates larger footprint and thermal mass. |
Compared with SMBJ150A and SMCJ150A, SMB6F154AY uniquely balances AEC-Q101 compliance, 1 mm profile, and precise 154 V standoff in SMB Flat-making it optimal for space-constrained, high-reliability CAN/LIN nodes where thermal and ESD margins must be simultaneously maximized.
Availability
SMB6F154AY is available at Aetrix Electronics and suitable for automotive CAN bus protection, engine control unit (ECU) power input conditioning, and body control module (BCM) LIN bus safeguarding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMB6F154AY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with vertical manufacturing and broad IP portfolio.
SMB6F154AY belongs to the SMB6FxxAY series-a family of AEC-Q101-qualified planar TVS diodes engineered specifically for ISO 7637-2 and ISO 10605 compliance in automotive electronics, emphasizing low leakage, high-temperature stability, and compact flat packaging.
FAQ
What is the maximum clamping voltage of SMB6F154AY under a 10/1000 µs surge?
The maximum clamping voltage is 246 V at 317 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases with junction temperature at a rate of 10.8 × 10–4/°C, reaching approximately 258 V at Tj = 175 °C based on the specified temperature coefficient.
Is SMB6F154AY compatible with lead-free reflow soldering processes?
Yes-SMB6F154AY features matte tin-plated leads qualified to J-STD-020 MSL Level 1 and supports ST's recommended reflow profile with peak temperature of 240–245 °C for 2–3 seconds. The package withstands up to 260 °C for 10 seconds during manual soldering per MIL-STD-750 Method 2026.
How does SMB6F154AY differ from standard SMBJ-series TVS diodes?
SMB6F154AY uses planar construction for lower leakage (0.2 µA vs. typical 1 µA) and higher Tj rating (175 °C vs. 150 °C), and is fully AEC-Q101 qualified with validated ISO 7637-2 Pulse 3a (–220 V) and ISO 10605 (±30 kV) performance-unlike generic SMBJ parts which lack automotive-specific stress testing and temperature derating data.
Can SMB6F154AY be used in bidirectional configurations?
No-it is strictly unidirectional, with cathode marking indicating polarity-sensitive placement. For bidirectional protection, ST offers the SMB6F154CA variant (dual-diode configuration); using SMB6F154AY in reverse-biased orientation risks permanent breakdown due to absence of symmetrical avalanche structure.
SMB6F154AY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AA, SMB Flat Leads
- Series:
- SMB6FxxAY
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMBflat
SMB6F154AY FAQ
1.How can I place an order for SMB6F154AY through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB6F154AY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB6F154AY reliable?
The price and inventory of SMB6F154AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB6F154AY is usually 5 days.
3.What payment methods are accepted for SMB6F154AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB6F154AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB6F154AY?
SMB6F154AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB6F154AY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB6F154AY?
For technical support, including SMB6F154AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB6F154AY requirements.
6.How does Aetrix verify that SMB6F154AY is sourced from the original manufacturer or authorized distributors?
All SMB6F154AY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB6F154AY meets industry standards.
7.What is the process for return or replacement of SMB6F154AY?
All SMB6F154AY units undergo pre-shipment inspection (PSI). If there is an issue with SMB6F154AY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB6F154AY part is unused and in its original packaging.
Return procedure for SMB6F154AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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